66506008 has 8 divisors (see below), whose sum is σ = 124698780. Its totient is φ = 33253000.

The previous prime is 66505997. The next prime is 66506017. The reversal of 66506008 is 80060566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4156618 + ... + 4156633.

Almost surely, 2^66506008 is an apocalyptic number.

It is an amenable number.

66506008 is a deficient number, since it is larger than the sum of its proper divisors (58192772).

66506008 is a wasteful number, since it uses less digits than its factorization.

66506008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313257 (or 8313253 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 66506008 is about 8155.1215809453. The cubic root of 66506008 is about 405.1541515514.

The spelling of 66506008 in words is "sixty-six million, five hundred six thousand, eight".